stachowski



J. STACHOWSKI.

SHREDDING MACHINE.

APPLICATION HLED DiscA 18. 1917.

:93 il. @Q 9 v Patented Oct. 21, 1919.

3 SHEETS-SHEET 1.

J. STACHOWSKL SHREDDING MACHINE.

APPLlcAnoN FILED Dic. la. 1917.

Patented Oct. 2l, i919.

3 SHEETS-SHEET 2 imma.,

WWA/55.5:

J. STACHOWSKI.

SHREDDING MACHINE.

APPL1c/1T10N F1LED Dials. 1911.

31.319.496. Patented 001. 21, 111111.

3 SHEETS-SHEET 3.

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\ man sTATES PATENT QFFICE' arosnrH sa'ncnowsm, or NEW Yoan, N. Y.,seremos ro scHUcH MACHINE ooiaram, or rmtannnrma, rnnn'srtvnma.

` samenwer-Massime.

Specification of Letters Patent.

Patented oet. 21,1919..

Application led December 18, 1917. 'SeriaINa 207,663. 3

and useful Improvements in Shredding- Machines,

of which the following is a specification.

This invention relates to shredding machines and particularly suchfasare adapted to cut waste paper into narrow strips capa-l ble for use asa substitute for eXcelsior.

The object of my inventionais a waste paper shredding machine comprisinga pair of parallel shafts rotating in opposite directions, each shaftprovided with an.alternating series of rotating cutters and'non-rotatingstrippers, the cutters of one shaft intermeshing with those of theother, each alternating series of cutters and strippers be ingadjustable longitudinally ofthe shaft.

A further object of this invention is to provide a waste paper shreddingmachine with strippers adapted, first-to prevent an excess of materialfrom being fed to the cutters, second-toguide thematerial over the.cutters While being shredded, third-to separate the shredded materialinto single thicknesses, fourth-to prevent the shredded material fromwinding about the cutters.

A still further object of this invention is 'to provide a waste papershredding machine with a chute for discharging the shredded material ina direction away from the rotating parts of the machine..y With theabove and related objects in view, this invention comprisestheconstruction, combination and arrangements of parts and the materialthereofy hereinafter' more fully described, an embodiment whereof isillustrated in the accompanying drawing, and is embraced withinthe scopeof the appended claims.-

in the Said dmWing; ri/gu1e1`is a pian view of the machine; Fig. 2 isaside elevation thereof; Fig. 3 is a fragmentary cen- `tral sectionthereof Fig. 4t is a fragmentary plan view partly in section; Fig. 5 isa detail view of a cutter; Fig. 6 is ak detail view of la stripper, andFig. 7 is an enlarged view of a central portion of the machine.

Referring more particularly to the draw ings for a detail description ofmy invention 1 represents a pair of standards mounted on a frame 2. Eachstandard is provided with a pair of horizontal bearings adaptedto-support a pair of shafts 3, one above the other and at a fixeddistance apart.

5 represents a disk ,provided with cutting` vthe shafts?) and withAa'plain faced hole for mounting it on the bars 9. Each of the shafts 3is provided with collars 11. 12, 13, and 1l.- The collarsv 13 areprovided with inner threads in mesh withthe threaded portions of theshafts 3.

15 represents `a table in front of the shafts 3, said table being'provided with sides 17 represents a-chute provided with wings 18. Q0represents a driven shaft. :21 represents a l,gear ixedly mounted on thepower shaft in mesh with a gear 22 loosely mounted on the driven shaft.23 represents a clutch for coupling t-he gear with the shaft 20, and Q3represents a lever for operating the clutch. .'24 represents a gearfiXedly mounted on the shaft 20 in mesh with a gear25 similarly mountedon one of the shafts`3. 26 represents a pair of gears mounted on theshafts 3 adapted to drive said shafts in opposite direct-ions asindicated by the arrows shown in F in assembling the machine, thecollars 11 are mounted on the shafts 3 in alinement and locked by means:of set screws, as shown in Fig. l.' The cuttersvand strippers are thenmounted alternately upon the shafts, throughout'their lengths includedbetween the wings 18 of the chute. The collars 12, 13, and 14 are thenslipped 011,' and the collars 13 vare turned until the cutting edges ofthe opposite cutters are in proper mesh. The collars 14 are then lockedby means of set screws or bolts, as shown inv Fig. 4f.

y rlhe operation is as follows The material to be shredded is fed overthe table 15, between its sides 16, in the direction of row tation ofthe cutters. The frontwardl)v projecting noses 27 of the strippersassure of the smooth movement of the material in the direction of thecutting edges. between the oppositely inclined surfaces Q8 of theoppositely mounted strippers which prevent any excess of of the shreddedmaterialsidewise, to protect the revolvin parts of the machine fromgetting clogge As the machine is primarily intended for shredding wastepaper, which is apt to be dry and subject to .become charged with staticelectricity while being shredded, the strippers are made of non-magneticmaterial, such as copper, to attract the charged layers in oppositedirections, and to discharge to the ground.

Having thus described my invention, what I claim as new and desire toprotect by Letters Patent, is l l. In a shredding machine, thecombination of a pair of oppositely rotating shafts, an alternate seriesof cutters and strippers mounted in facial contact on each shaft, thecutters of one shaft intermeshing with those of the other shaft, thecutters being mounted to rotate with their respective shafts, means forholding the strippers stationary, and means for moving the cutters andstrippers longitudinally. of their respective shafts.

2. In a shredding machine, the combination of a pair of parallel shafts,an alternate series of cutters and strippers forming a compact cutterhead and mounted on each shaft, the cutters of one shaft intermeshingwith those of the other shaft, the cutters being mounted to rotate vwiththeir respective shafts, means for preventing the strippersv Afromrotating, and means for adjusting the cutters and stripperslongitudinally.

3. In a shredding machine, the combination of a pair of parallel shafts,an alternate series of rotating cutters andJ stationary strippersforming a compact cutter head and ii mounted on each shaft, the cuttersof oneshaft intermeshing with those of the other,

thestrippers of each shaft having projections opposite the cutters ofthe opposite y shaft.

y 4. In `a shredding machine, the combination of a pair of parallelshafts, an alternate series of cutters and strippers-forming a Ycompact-cutter head and mounted on each shaft, the cutters of one shaftir'i'termeshingl with those of the other, each stripper being heldstationary and having a rounded-off projection frontwardly' of thecutters and a sharp-edged projection rearwardlyof the cutters, thestrippers of one shaft being'inv strippers forming a compact cutter headand mounted on each shaft, the strippers being provided with projectionsfrontwardly an rearwardly of the cutters, the distance between thefrontward projections of the opposite strippers being .greater than thatbetween the rearward projections.

6. In a shredding machine, the combination of a pair of oppositelrotating shafts, a series of cutters carried hy each shaft, the cuttersof one shaft intermeshing with those of the other, strippers mounted on.said shafts and filling the longitudinal space between cutters, thestrippers of one shaft being opposite the cutters of the other shaft,means for preventing the strippers from rotating, and means for movingthe cutters and strippers longitudinally of the shafts.

7. In a shredding' machine, the combination of a pair of oppositely'rotating shafts, a series of cutters carried by each shaft, the cuttersof one shaft intermeshing with those of the other, strippers ofnon-magnetic ing the strippers and cutters longitudinaly of the shafts.

8. Ina shredding machine, oppositely rotating cutter heads solidly builtup of alternate rotating disks and stationary plates in facial contactwith each other, the disks projecting beyond the plates and intermeshingbetween the two heads to act as cutters, and

the plates projecting beyond the disksy to act' as strippers.

9. In a shredding machine, tating cutter heads solidly built up ofalter-J nate rotating disks and stationaryplates in facial contact witheach other, the disks projecting beyond the plates and intermeshingbetween the two heads to act as cutters, the

oppositely roplates projecting beyond the disks, to act as strippers,and meanstoadjust the disks and plates longitudinally.

10. In a shreddlng machine, a cutter head vconsisting of the combinationof rotating cutters and stationary strippers arranged alsaid shaftbetween each pairofcutters, andA means for holding the strippers fromrota- JOSEPH s TAoHowsKi.

tion.

ternately in facial contact and strung on the I cuttin shaft of themachine.

